1372772661 has 32 divisors (see below), whose sum is σ = 2091858048. Its totient is φ = 793282560.

The previous prime is 1372772587. The next prime is 1372772669. The reversal of 1372772661 is 1662772731.

It is a de Polignac number, because none of the positive numbers 2^k-1372772661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372772669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 323425 + ... + 327641.

It is an arithmetic number, because the mean of its divisors is an integer number (65370564).

Almost surely, 2^1372772661 is an apocalyptic number.

It is an amenable number.

1372772661 is a deficient number, since it is larger than the sum of its proper divisors (719085387).

1372772661 is a wasteful number, since it uses less digits than its factorization.

1372772661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4741.

The product of its digits is 148176, while the sum is 42.

The square root of 1372772661 is about 37050.9468300069. The cubic root of 1372772661 is about 1111.3892895600.

The spelling of 1372772661 in words is "one billion, three hundred seventy-two million, seven hundred seventy-two thousand, six hundred sixty-one".