40166537496461 has 4 divisors (see below), whose sum is σ = 40167559767132. Its totient is φ = 40165515225792.

The previous prime is 40166537496341. The next prime is 40166537496467. The reversal of 40166537496461 is 16469473566104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23810935326025 + 16355602170436 = 4879645^2 + 4044206^2 .

It is a cyclic number.

It is not a de Polignac number, because 40166537496461 - 2²² = 40166533302157 is a prime.

It is a super-2 number, since 2×40166537496461² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40166537496394 and 40166537496403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40166537496467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511076396 + ... + 511154981.

It is an arithmetic number, because the mean of its divisors is an integer number (10041889941783).

Almost surely, 2^{40166537496461} is an apocalyptic number.

It is an amenable number.

40166537496461 is a deficient number, since it is larger than the sum of its proper divisors (1022270671).

40166537496461 is a wasteful number, since it uses less digits than its factorization.

40166537496461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022270670.

The product of its (nonzero) digits is 78382080, while the sum is 62.

The spelling of 40166537496461 in words is "forty trillion, one hundred sixty-six billion, five hundred thirty-seven million, four hundred ninety-six thousand, four hundred sixty-one".