740670437021 has 4 divisors (see below), whose sum is σ = 740672232000. Its totient is φ = 740668642044.

The previous prime is 740670437011. The next prime is 740670437041. The reversal of 740670437021 is 120734076047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120734076047 = 13 ⋅9287236619.

It is a cyclic number.

It is not a de Polignac number, because 740670437021 - 2¹⁰ = 740670435997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 740670437021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740670437011) 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, 66860 + ... + 1218938.

It is an arithmetic number, because the mean of its divisors is an integer number (185168058000).

Almost surely, 2^740670437021 is an apocalyptic number.

It is an amenable number.

740670437021 is a deficient number, since it is larger than the sum of its proper divisors (1794979).

740670437021 is a wasteful number, since it uses less digits than its factorization.

740670437021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794978.

The product of its (nonzero) digits is 197568, while the sum is 41.

The spelling of 740670437021 in words is "seven hundred forty billion, six hundred seventy million, four hundred thirty-seven thousand, twenty-one".