66407656102 has 8 divisors (see below), whose sum is σ = 100271163312. Its totient is φ = 32983935000.

The previous prime is 66407656031. The next prime is 66407656153. The reversal of 66407656102 is 20165670466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66407656102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109946149 + ... + 109946752.

It is an arithmetic number, because the mean of its divisors is an integer number (12533895414).

Almost surely, 2^66407656102 is an apocalyptic number.

66407656102 is a deficient number, since it is larger than the sum of its proper divisors (33863507210).

66407656102 is a wasteful number, since it uses less digits than its factorization.

66407656102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219893054.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 66407656102 in words is "sixty-six billion, four hundred seven million, six hundred fifty-six thousand, one hundred two".